It's not the best, but I've just been using the Apple Stocks app. You can track coffee by entering the stock symbol for coffee (KC) followed by the trading month code. For example trading is July 14 right now, making the current symbol KCN14. You do have to enter the new symbol whenever a trading month expires. It only gives you very basic statistics, and only keeps track of those statistics for that particular trading code. But for a quick reference to the current price of the market it will do.I'd be very interested to hear of any other apps that track the market, maybe even something with links to news articles would be nice!